If you are buying for a skater and need a little help understanding the skate terms on this site, our footnotes are your friend.Skateboarding trucks are the part of the board that bind the wheels to the deck. Two trucks are required for a single skateboard, one for the front and one for the rear. Each truck holds two wheels. The wheels are attached to the axle of the truck with bearings and a nut and bolt assembly. Thank you for shopping for at ClassicBoardco Skateboards